Wallpaper calculator
How many rolls of wallpaper a room takes. Enter the room, the wall height, and the roll width and length from the label.
The editor opens with this room, inside sizes and wall height, ready to draw the rest of the home.
No default from us: there is no neutral source for roll sizes. Use the numbers on your label.
- Area first, then rolls
- Check the label on the roll
Divide the distance around the room by the roll width for the number of strips. Divide the roll length by one strip (the wall height, plus 4 in to trim, plus the pattern repeat), and round down for the strips per roll. Divide the strips by that and round up. Updated · How we calculate
How we calculate
How we calculate
The wall area comes from our calculation core: the distance around the room times the wall height. For wallpaper the strips count more than the area: each strip is one wall height plus 4 in (10 cm) to trim at the ceiling and the floor, plus the pattern repeat, and a roll only holds whole strips. The editor counts the same way.
We found no public, neutral source for roll sizes, so the calculator has no default number: type the numbers from the label or ask the store. We do not take off doors and windows: the paper around them is cut from strips we already count.
| What | Figure |
|---|---|
| Roll width and length | No default: you type them from the label · No public source yet |
| Pattern repeat | From the label; empty means none · No public source yet |
| Extra to trim, per strip | 4 in (10 cm, half at the ceiling and half at the floor), our own starting value, the same as in the editor · No public source yet |
No public source yet for roll sizes, so the calculator has no default: type the numbers from your label.
Before you buy
Before you buy
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Check the label
Roll width, roll length and the pattern repeat are on the label and differ per paper.
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Same batch number
Buy all rolls with the same batch number: color can differ between batches.
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Keep a roll
Keep a spare roll for repairs later.
Other materials
Other materials
- Work it out →
Paint calculator
How many gallons of paint a room takes.
- Work it out →
Drywall calculator
How many drywall sheets a room takes.
- Work it out →
Flooring calculator
How much flooring to buy for a room, with extra for cuts and waste.
- Open the calculator →
Room square feet
The area of every room, and the total for the home.
Questions
Questions
About wallpaper. Can’t find your answer? Send us a message.
info@squaremetry.comHow many rolls of wallpaper do I need?
Divide the distance around the room by the roll width for the number of strips. Work out how many whole strips fit on one roll, then divide and round up.
What is a pattern repeat?
The height after which the pattern starts again. Each strip must start at the same point in the pattern, so the calculator adds the repeat to every strip.
Should I take off doors and windows?
The calculator does not. The paper above and below a door or window is cut from strips you already count.
What roll size should I use?
The width and length on your label. We found no public, neutral source for standard roll sizes, so the calculator has no default.
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